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If found, your line cutter will be taken. I think the story of how I lost mine will be instructive on a couple levels. I have always carried my computers (wrist) in carry on. I have a Trilobite line cutter attached to the computer straps for my left wrist, and I take it out and put it in...

Yeah. I was trained to do this myself, as were my dive buddies in our UTD training group, including the ones who got bent after a dive in which their math on that calculation (and other parts of the dive) was not all that it should be. Call me crazy, but when I am on a NDL dive, I prefer to...

You are at depth when your computer fails. Where do you find your average depth?

Writing the article I did required extensive communication with Dr. Simon Mitchell, and in that communication he made his belief clear. Contrary to the smug statements of the "all dives are decompression dives" folks, he says there is a clear difference. The NEDU study's clear implication for...

but...but...but...he said he could "keep diving."

So let's say you are doing a multi-level dive (for the sake of argument, on air). Your maximum depth was 91 feet, but you were there only about 8 minutes before beginning a multi-level ascent. You are at 36 feet when your computer fails after 36 minutes of dive time. Tell me what you do next...

I want to pile on with those who talk about the time commitment needed for a young family. When my children were still living at home, they took up so much of my time I could not possibly have been a technical diver. I did not become even a serious OW diver until the children were nearly grown...

Recent studies spurred by the torrent of lies and other forms of misinformation flooding the political landscape have shown that when a person is misinformed, that person will not only continue to believe the misinformation after being given accurate information, that person's misinformed...

This is just a general observation that this thread as a whole shows a problem within the scuba diving community as a whole. I first saw it when one of my former students did a dive with a tech instructor who freaked out when he saw the GFs my former student was using. The instructor had learned...

When you are on a multi-level dive led by a DM in a place like Cozumel, the DM will lead the dive so that they are shallow enough for the air divers to finish the dive based on air supply rather than NDL. Any nitrox divers in a mixed group will simply have more NDL left when the dive ends. It...

It's the sort of thing that happens when the developer, owner, and seller of a product is on your board of directors.

You evidently don't keep up with scuba-based social media. "Defective" is too strong a term, but for lots of divers, it is definitely the least preferred. There is an overall feeling that it is too punitive of variations in ascent speed. People feel it demands too long of a surface interval...

RTFM--sometimes it helps. I have never read the manual for this computer, so I am speaking in general of manuals I have read, and in those cases, I would call them borderline unreadable. Because of concerns with liability, they include every blessed fact possible (with exceptions noted later...

The week after the trip I mentioned in post #18, I was with another group, and that group included a couple friends whose names ScubaBoard people back then would have known well. they, too, had big camera rigs, but they did no damage to the reefs. Both were cave certified. I am not saying cave...

Pray be specific. You named a computer with an algorithm that most experienced divers consider to be defective and without many of the features of a Shearwater. It has a lower price, but it does not do the same thing. Or did you mean that for the average OW diver doing relatively shallow...

I am going to go out on a limb and say it is an honest (but effectively useless) attempt to protect the reefs from damage by photographers. I experienced something similar in the Philippines. Even though I am not a photographer, I could not do my first dive with a Puerto Galera operation...

This is reminding me of a thread from a few years ago. A poster who used a username that suggested he was representing Suunto (he later admitted to being a low level Suunto employee) focused on the dangers of IBCD. IIRC, he described the switch from 21/35 to EANx 50 as "suicidal." (For...

Any random number is easy to remember. Being easy to remember does not make it right.

So what will happen over the coming years? Here is a story that might be instructive. I was on a dive boat heading out for the dive site, and it was a pretty long haul. I was sitting next to two gray-haired veterans, divers I had seen before and knew to be highly skilled and experienced. I...

Most of the diving in the GBR is not difficult. I have done two LOB trips there, and each one had very new divers who had no trouble. On the last trip, two of the divers were only scuba certified, meaning they had not completed the full OW course and were required to dive with a professional. I...